Synthesis and structural characterization of binuclear palladium(II) complexes of salicylaldimine dithiosemicarbazones

Tameryn Stringer, Prinessa Chellan, Bruno Therrien, Nelusha Shunmoogam-Gounden, Denver T. Hendricks, Gregory S. Smith

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A series of binuclear palladium(II) salicylaldiminato dithiosemicarbazone complexes have been synthesized and characterized. The palladium complexes were obtained by the reaction of various ethylene- and phenylene-bridged dithiosemicarbazones with Pd(PPh3)2Cl2. The free salicylaldimine ligands and their palladium complexes were characterized by NMR and IR spectroscopies, ESI-mass spectrometry, elemental analyses and for two representative complexes also by X-ray diffraction. In both metal complexes, the solid-state structures show the two palladium centers to be coordinated in a slightly distorted square-planar geometry, which gives rise in each case to five- and six-membered chelate rings. The salicylaldimine thiosemicarbazone ligands coordinate to palladium in a tridentate manner, through the phenolic oxygen, imine nitrogen and thiolate sulfur atoms.
Original languageEnglish
Pages (from-to)2839-2846
Number of pages8
Issue number14
Early online date16 Jun 2009
Publication statusPublished - 23 Sep 2009

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